Features:Product function: This product is suitable for measuring air pressure and suitable for high-pressure valves. Our barometer is mainly used for water inflatable products, inflatable boat surfboards and so on. When using such products, you should develop good habits to ensure that the right amount of air pressure is safer and the product will be used for a longer time.High quality: The product is made of PVC pipe & rubber protective sleeve, which is safe to protect against corrosion and fall, and the special gas nozzle is strong and durable.Specification:Material: PVC Pipe & RubberSize: the diameter of the dial is 3.8cm, the diameter of the PVC pipe is 1.96cmPackage List:1 x Air Pressure GaugeNote: 1.Please allow 1-2cm measuring deviation due to manual measurement.2.Due to the different monitor and light effect, the actual color of the item might be slight different from the color shown on the pictures. Please Understand, Thanks!